I'll quickly mention this one. Even if you've only a passing interest in fast hardcore then you're probably more than aware of Seein Red. Dutch thrashers that have been going for years and years. Plus they started the whole thing off when they did Larm in the early 80s.
Mihoen are top stuff too.
Basically, it's punk. Worth checking out the Wreck Of Old 98 album. Bit of Minutemen worship going on.